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Finding the Fourth Proportional to 666,767.92, 920,139.82 and 360,844.40

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Solution

The fourth proportional to 666,767.92, 920,139.82 and 360,844.40 is: 497,965.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,767.92 : 920,139.82 = 360,844.40 : x
  2. Step 2: Convert to fraction form
    666,767.92/920,139.82 = 360,844.40/x
  3. Step 3: Cross multiply
    666,767.92x = 920,139.82 × 360,844.40
  4. Step 4: Simplify right side
    666,767.92x = 332,027,295,761.20
  5. Step 5: Solve for x
    x = 332,027,295,761.20/666,767.92
  6. Step 6: Final answer
    x = 497,965.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.